 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  ******************************************************************************/

 package org.eclipse.ui.internal.preferences;

 import java.util.ArrayList ;
 import java.util.Collection ;

 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.ui.internal.WorkbenchPlugin;
 import org.eclipse.ui.internal.registry.IWorkbenchRegistryConstants;
 import org.eclipse.ui.internal.registry.RegistryReader;

 /**
  * The SettingsTransferRegistryReader is the class that supplies all of the
  * transfer settings used by the settingsTransfer in the preferencesTransfer
  * extension point.
  *
  *
  * @since 3.3
  *
  */
 public class SettingsTransferRegistryReader extends RegistryReader {

     Collection settingsTransfers = new ArrayList ();

     /**
      * Create an instance of the receiver.
      */
     public SettingsTransferRegistryReader() {

     }

     /**
      * Get all of the currently registered settings transfers.
      *
      * @return IConfigurationElement[]
      */
     public IConfigurationElement[] getSettingTransfers() {

         settingsTransfers = new ArrayList ();
         IExtensionRegistry registry = Platform.getExtensionRegistry();
         readRegistry(registry, WorkbenchPlugin.PI_WORKBENCH,
                 IWorkbenchRegistryConstants.PL_PREFERENCE_TRANSFER);

         IConfigurationElement[] transfers = new IConfigurationElement[settingsTransfers
                 .size()];
         settingsTransfers.toArray(transfers);
         return transfers;

     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.internal.registry.RegistryReader#readElement(org.eclipse.core.runtime.IConfigurationElement)
      */
     protected boolean readElement(IConfigurationElement element) {
         if (element.getName().equals(
                 IWorkbenchRegistryConstants.TAG_SETTINGS_TRANSFER)) {

             settingsTransfers.add(element);
             return true;
         }

         //Ignore the preference transfers
 return element.getName().equals(
                 IWorkbenchRegistryConstants.TAG_TRANSFER);
     }

 }

